code: def _copy_tree_to_unique_temp_dir(source, base_temp_dir_path):
      """Copies from source to a unique sub directory under base_temp_dir_path."""
      destination = common.get_unique_temp_path(base_temp_dir_path)
      _copy_tree(source, destination)
      return destination
  
file_path: transform/tensorflow_transform/beam/tft_beam_io/transform_fn_io.py
imports: import os
  import apache_beam
  import tensorflow_transform
  from tensorflow_transform import impl_helper
  from tensorflow_transform.beam import common
  from tensorflow_transform.beam.tft_beam_io import beam_metadata_io
  from tensorflow_transform.tf_metadata import metadata_io
label_desc: Use image node_id 1 for calling a global function with example usage: _copy_tree_to_unique_temp_dir(source, base_temp_dir_path) and returns: destination